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DE29921084U1 - Short catheter - Google Patents

Short catheter

Info

Publication number
DE29921084U1
DE29921084U1 DE29921084U DE29921084U DE29921084U1 DE 29921084 U1 DE29921084 U1 DE 29921084U1 DE 29921084 U DE29921084 U DE 29921084U DE 29921084 U DE29921084 U DE 29921084U DE 29921084 U1 DE29921084 U1 DE 29921084U1
Authority
DE
Germany
Prior art keywords
needle
catheter
short
hub
needle guard
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE29921084U
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
B Braun Melsungen AG
Original Assignee
B Braun Melsungen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8082345&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE29921084(U1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to DE29921084U priority Critical patent/DE29921084U1/en
Application filed by B Braun Melsungen AG filed Critical B Braun Melsungen AG
Publication of DE29921084U1 publication Critical patent/DE29921084U1/en
Priority to DE50010823T priority patent/DE50010823D1/en
Priority to ES00124007T priority patent/ES2244384T3/en
Priority to EP00124007A priority patent/EP1106199B1/en
Priority to AT00124007T priority patent/ATE300329T1/en
Priority to US09/727,747 priority patent/US6709419B2/en
Priority to US10/779,370 priority patent/US7186239B2/en
Priority to US11/327,206 priority patent/US7160269B2/en
Priority to US11/678,499 priority patent/US7806849B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0618—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for protecting only the distal tip of the needle, e.g. a needle guard
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3245—Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3247—Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
    • A61M2005/325—Means obstructing the needle passage at distal end of a needle protection sleeve
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3273—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel freely sliding on needle shaft without connection to syringe or needle

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Materials For Medical Uses (AREA)

Abstract

A short catheter comprises a tube (10) with a proximal end attachment (11), a hollow needle (18) which can be pushed through the tube, and needle attachment. The latter has a projection which extends into the catheter attachment. A protective member (22) is located over the needle in the catheter attachment, with a hole for needle. The protective member is axially tensioned and axial expansion is prevented.

Description

KurzkatheterShort catheter

Die Erfindung betrifft einen Kurzkatheter, bei dem die in das Katheterrohr eingeschobene Nadel, nach dem Herausziehen durch einen Nadelschutz unbrauchbar gemacht wird.The invention relates to a short catheter in which the needle inserted into the catheter tube is rendered unusable by a needle guard after it is pulled out.

Kurzkatheter werden auch als Venenkatheter oder IV-Katheter bezeichnet. Sie weisen ein flexibles Katheterrohr auf, das an einem Ende mit einem Katheteransatz versehen ist. In das Katheterrohr ist eine hohle Nadel eingeschoben, die am distalen Ende eine schneidende Nadelspitze und am proximalen Ende einen Nadelansatz aufweist. Mit der Nadelspitze wird die Nadel mit dem sie umgebenden Katheterrohr in den Körper des Patienten eingeführt. Nachdem die Spitze des Katheterrohres in eine Vene eingedrungen ist, wird die Nadel zurückgezogen.Short catheters are also known as venous catheters or IV catheters. They have a flexible catheter tube with a catheter hub at one end. A hollow needle is inserted into the catheter tube, which has a cutting needle tip at the distal end and a needle hub at the proximal end. The needle and the catheter tube surrounding it are inserted into the patient's body using the needle tip. After the tip of the catheter tube has penetrated a vein, the needle is withdrawn.

Aus WO 99/08742 ist ein Kurzkatheter bekannt, bei dem die Nadel mit einem Nadelschutz versehen ist. Der Nadelschutz besteht aus einer metallischen elastischen Klemme, die in dem Hohlraum desWO 99/08742 discloses a short catheter in which the needle is provided with a needle guard. The needle guard consists of a metallic elastic clamp which is inserted into the cavity of the

Telefon: (0221) 916520 · T«5lefei?T;O221) 334297*.4; TeleTax::(G JE!! (P22D.ai 2OpOt &iacgr; eMail: mail@dompatent.deTelephone: (0221) 916520 · T«5lefei?T;O221) 334297*. 4 ; TeleTax::(G JE!! (P22D.ai 2OpOt &iacgr; eMail: mail@dompatent.de

Katheteransatzes enthalten ist und Löcher für den Durchtritt für die Nadel aufweist. Der Nadelschutz drückt mit einem Hakenteil seitlich gegen die Nadel. Wenn beim Zurückziehen der Nadel die Nadelspitze das Hakenteil passiert, schnappt das Hakenteil über die Nadelspitze über, so dass diese von dem Hakenteil übergriffen wird und nicht mehr zugänglich ist. Dadurch werden Verletzungen von Personen durch die Nadelspitze verhindert. Insbesondere wird auch die Kontaminationsgefahr durch an der Nadel haftende Keime, die beim erstmaligen Gebrauch auf die Nadel übertragen wurden, verringert. Durch den Nadelschutz ist sichergestellt, dass die Nadel nur einmal gebraucht werden kann, so dass nicht eine kontaminierte Nadel bei einem anderen Patienten wiederbenutzt wird. Um das Abgleiten des Nadelschutzes über das distale Nadelende hinaus zu verhindern, kann an der Nadel ein entsprechendes Rastmittel in Form einer Kerbe oder einer Unrundheit vorgesehen sein, welches einen distalen Anschlag zur Begrenzung der Bewegung des Nadelschutzes bildet.catheter hub and has holes for the needle to pass through. The needle guard presses against the side of the needle with a hook part. When the needle tip passes the hook part when the needle is withdrawn, the hook part snaps over the needle tip so that the hook part engages over it and is no longer accessible. This prevents injuries to people from the needle tip. In particular, the risk of contamination from germs adhering to the needle that were transferred to the needle when it was used for the first time is reduced. The needle guard ensures that the needle can only be used once so that a contaminated needle is not reused on another patient. To prevent the needle guard from slipping beyond the distal end of the needle, a corresponding locking device in the form of a notch or an out-of-roundness can be provided on the needle, which forms a distal stop to limit the movement of the needle guard.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Kurzkatheter mit Nadelschutz zu schaffen, bei dem der Nadelschutz in seiner die Nadelspitze überdeckenden Position infolge von Klemmwirkung einen festen Halt hat.The present invention is based on the object of creating a short catheter with needle protection, in which the needle protection has a firm hold in its position covering the needle tip due to a clamping effect.

Der erfindungsgemäße Kurzkatheter weist die im Anspruch 1 angegebenen Merkmale auf. Hiernach ist der Nadelschutz in dem Katheteransatz in axialer Richtung vorgespannt, wobei seine Enden gegen axiales Ausdehnen fixiert sind. Im vorgespannten Zustand kann die Nadel leicht durch die Löcher des Nadelschutzes hindurchgeschoben werden, weil die Löcher dann so orientiert sind, dass die Nadel leicht verschoben werden kann. Im Auslösefall, wenn also die Nadelspitze das Hakenteil passiert hat, schnappt das Hakenteil über die Nadelspitze über,The short catheter according to the invention has the features specified in claim 1. According to this, the needle guard is pre-tensioned in the catheter hub in the axial direction, with its ends being fixed against axial expansion. In the pre-tensioned state, the needle can easily be pushed through the holes in the needle guard because the holes are then oriented in such a way that the needle can be easily moved. In the event of a trigger, i.e. when the needle tip has passed the hook part, the hook part snaps over the needle tip,

♦ ♦ ·♦♦ ·

wodurch die axiale Spannung des Federelements aufgehoben wird. Das Federelement wird dadurch in seine gestreckte Ursprungsform zurückversetzt. Dadurch werden die Löcher, die zuvor die Nadel mit geringem Spiel umgeben hatten, plötzlich in einer Richtung enger, wodurch das Federelement sich an der Nadel festkrallt. Durch das Aufheben der axialen Vorspannung und das Zurückfedern des Federelements wird eine feste Klemmung der Nadel an den Lochrändern des Federelements bewirkt. Dadurch kann in vielen Fällen auf Rast- oder Blockiermittel an der Nadel verzichtet werden, so dass die Nadel gegenüber herkömmlichen Nadeln keine Veränderung erfahren muß.whereby the axial tension of the spring element is removed. The spring element is thereby returned to its original, stretched shape. As a result, the holes that previously surrounded the needle with little play suddenly become narrower in one direction, causing the spring element to grip the needle tightly. By removing the axial pre-tension and allowing the spring element to spring back, the needle is firmly clamped to the hole edges of the spring element. In many cases, this means that locking or blocking devices on the needle can be dispensed with, so that the needle does not have to undergo any changes compared to conventional needles.

Damit der Nadelschutz im axial komprimierten Zustand in dem Innenraum des Katheteransatzes untergebracht werden kann, muß im Katheteransatz ein Haltemittel vorgesehen sein, welches einen Anschlag für das distale Ende des Nadelschutzes, nämlich das Hakenteil, bildet. Ein solches Haltemittel besteht vorzugsweise aus einem Metallteil, welches in das Katheterrohr ragt und dieses in dem Katheteransatz abstützt. Ein solches Metallteil ist als interne Katheterabstützung üblicherweise in einem Katheteransatz enthalten. Das Metallteil kann auf einfache Weise modifiziert werden, um eine Anschlagschulter für den Nadelschutz zu bilden. Diese Anschlagschulter kann aus einer Stirnwand bestehen, die am Öffnungsende eines Trichters des Metallteils angeformt ist.In order for the needle guard to be accommodated in the interior of the catheter hub in the axially compressed state, a holding means must be provided in the catheter hub, which forms a stop for the distal end of the needle guard, namely the hook part. Such a holding means preferably consists of a metal part which projects into the catheter tube and supports it in the catheter hub. Such a metal part is usually included in a catheter hub as an internal catheter support. The metal part can be easily modified to form a stop shoulder for the needle guard. This stop shoulder can consist of an end wall which is formed on the opening end of a funnel of the metal part.

Vorzugsweise besteht ein proximales Haltemittel aus einer Endkante des Nadelschutzes, welche in die Wand des Katheteransatzes hineinragt. Diese Endkante kann angeschärft sein und sich bei der Montage des Nadelschutzes in die Wand des Katheteransatzes eingraben.Preferably, a proximal holding means consists of an end edge of the needle guard, which protrudes into the wall of the catheter hub. This end edge can be sharpened and dig into the wall of the catheter hub when the needle guard is mounted.

-A--A-

Im folgenden wird unter Bezugnahme auf die Zeichnungen ein Ausführungsbeispiel der Erfindung näher erläutert.In the following, an embodiment of the invention is explained in more detail with reference to the drawings.

Es zeigen:Show it:

Fig. 1 einen Längsschnitt durch den Kurzkatheter,Fig. 1 a longitudinal section through the short catheter,

Fig. 2 einen Längsschnitt nach dem Einsetzen der Nadel, wobei der Kurzkatheter im anwendungsbereiten Zustand ist,Fig. 2 a longitudinal section after insertion of the needle, with the short catheter in the ready-to-use state,

Fig. 3 einen Schnitt entlang der Linie III-III von Fig. 2,Fig. 3 is a section along the line III-III of Fig. 2,

Fig. 4 einen Längsschnitt während des Herausziehens der Nadel undFig. 4 a longitudinal section during the withdrawal of the needle and

Fig. 5 einen Schnitt entlang der Linie V-V von Fig. 4.Fig. 5 is a section along the line V-V of Fig. 4.

Der dargestellte Kurzkatheter weist ein flexibles Katheterrohr 10 aus elastischem Kunststoff auf, das am proximalen Ende mit einem Katheteransatz 11 versehen ist. Der Katheteransatz 11 besteht aus einem langgestreckten hohlen Kunststoffteil, das einen leicht konischen Innenraum 12 hat und am proximalen Ende mit einem Luer-Anschluß 13 versehen ist. Der distale EndbereichThe short catheter shown has a flexible catheter tube 10 made of elastic plastic, which is provided with a catheter hub 11 at the proximal end. The catheter hub 11 consists of an elongated hollow plastic part that has a slightly conical interior 12 and is provided with a Luer connector 13 at the proximal end. The distal end area

14 ist rohrförmig. Durch ihn ragt das Katheterrohr 10- bis zum Innenraum 12. In das proximale Ende des Katheterrohrs 1.0 ist ein rohrförmiges Metallteil 15 eingeschoben, welches das Katheterrohr aufweitet und gegen die Wand des rohrförmigen Bereichs 14 drückt. Am proximalen Öffnungsende des Metallteils14 is tubular. The catheter tube 10- extends through it to the interior 12. A tubular metal part 15 is inserted into the proximal end of the catheter tube 1.0, which expands the catheter tube and presses it against the wall of the tubular area 14. At the proximal opening end of the metal part

15 ist das Metallteil als Trichter 16 aufgeweitet. Dem Öffnungsende des Trichters 16 ist eine radial · nach innen weisende Stirnwand 17 angeformt.15, the metal part is expanded to form a funnel 16. A radially inward-facing end wall 17 is formed on the opening end of the funnel 16.

In das Katheterrohr 10 wird eine hohle Nadel 18 eingeschoben, die am distalen Ende eine schneidende Nadelspitze 19 aufweist. Die Nadel 18 besteht aus Stahl. Sie ist am rückwärtigen Ende mit einem Nadelansatz 20 aus Kunststoff verbunden. Der Nadelansatz 20 stößt gegen das proximale Ende des Katheteransatzes 11 und er ragt dann mit einem kegelstumpfförmigen Vorsprung 21, der locker in den Katheteransatz 11 hineinpaßt, in den Innenraum 12.A hollow needle 18 is inserted into the catheter tube 10, which has a cutting needle tip 19 at the distal end. The needle 18 is made of steel. It is connected at the rear end to a needle hub 20 made of plastic. The needle hub 20 abuts against the proximal end of the catheter hub 11 and then protrudes into the interior 12 with a truncated cone-shaped projection 21 that fits loosely into the catheter hub 11.

Der Innenraum 12 enthält den Nadelschutz 22, der aus einem Federelement aus gebogenem Federstahlblech besteht. Der Nadelschutz ist generell Z-förmig gebogen, wobei ein rückwärtiger Schenkel 23, ein mittlerer Schenkel 24 und ein vorderer Schenkel 25 aufeinander folgen. Dem vorderen Schenkel 25 ist ein Hakenteil 26 angeformt, welches um mehr als 90° umgebogen ist. In dem rückwärtigen Schenkel 23 und dem mittleren Schenkel 24 sind jeweils ein Loch 27 bzw. 28 vorhanden.The interior 12 contains the needle guard 22, which consists of a spring element made of bent spring steel sheet. The needle guard is generally bent in a Z shape, with a rear leg 23, a middle leg 24 and a front leg 25 following one another. A hook part 26 is formed on the front leg 25, which is bent by more than 90°. In the rear leg 23 and the middle leg 24 there is a hole 27 and 28 respectively.

Der Nadelschutz 22 wird gemäß Fig. 1 auf der Nadel 18 sitzend in den Katheteransatz eingesetzt, wobei er mit dem Hakenteil 26 gegen die Stirnwand 17 des Metallteils 16 gesetzt wird. Dann wird mit einem (nicht dargestellten) Werkzeug, das vom proximalen Ende her in den Innenraum 12 eingeführt wird, gemäß Pfeil 32 axialer Druck ausgeübt, wobei der Nadelschutz 22 in axialer Richtung komprimiert wird. Die axiale Richtung ist an der Ausrichtung der Achse des Katheterrohres 10 orientiert. Bei der axialen Kompression wird ein zwischen den Abschnitten 24 und 25 gebildetes vorderes Knie 33 des Nadelschutzes in eine innere umlaufende Nut 29 des Innenraums gedrückt. Ein entgegengesetztes Knie 30 verbindet die Abschnitte 23 und 24.The needle guard 22 is inserted into the catheter hub as shown in Fig. 1, sitting on the needle 18, with the hook part 26 being placed against the front wall 17 of the metal part 16. Then, using a tool (not shown) that is inserted into the interior 12 from the proximal end, axial pressure is exerted as shown by arrow 32, whereby the needle guard 22 is compressed in the axial direction. The axial direction is oriented to the orientation of the axis of the catheter tube 10. During the axial compression, a front knee 33 of the needle guard formed between the sections 24 and 25 is pressed into an inner circumferential groove 29 of the interior. An opposite knee 30 connects the sections 23 and 24.

• ·
4 « ·
4 «

In diesem zusammengedrückten Zustand des Nadelschutzes 22 sind die Löcher 27,28 in axialer Projektion kreisrund. Dies bedeutet, dass das Loch 28 im schrägen mittleren Schenkel 24 oval ist und in Längsrichtung eine größere Ausdehnung hat als in Querrichtung.In this compressed state of the needle guard 22, the holes 27, 28 are circular in axial projection. This means that the hole 28 in the oblique middle leg 24 is oval and has a larger extension in the longitudinal direction than in the transverse direction.

Beim axialen Zusammendrücken des Nadelschutzes 22 wird die Endkante 31 des Abschnitts 23 in die Wand des Katheteransatzes 11 eingedrückt. Dadurch verkrallt sich das rückwärtige Ende des Nadelschutzes in der Wand, während das vordere Ende des Nadelschutzes an der Stirnwand 17 abgestützt ist. In diesem Zustand kann die Nadel 18 vom proximalen Ende her eingeschoben werden, wobei sie durch die Löcher 27 und 28 mit Spiel hindurchgeht und widerstandslos vorgeschoben werden kann. Das Hakenteil 26 wird von der Nadel 18 radial nach außen verschoben, so dass es nach dem weiteren Vorschieben der Nadel 18 seitlich gegen die Nadel drückt.When the needle guard 22 is compressed axially, the end edge 31 of the section 23 is pressed into the wall of the catheter hub 11. As a result, the rear end of the needle guard grips the wall, while the front end of the needle guard is supported on the front wall 17. In this state, the needle 18 can be pushed in from the proximal end, passing through the holes 27 and 28 with some play and being able to be pushed forward without resistance. The hook part 26 is pushed radially outwards by the needle 18, so that after the needle 18 is pushed forward further, it presses laterally against the needle.

Die Fign. 4 und 5 zeigen den Zustand des Kurzkatheters während des Zurückziehens der Nadel 18 aus dem Katheterrohr 10 und dem Katheteransatz 11. Während des Zurückziehens der Nadel 18 schnappt das Hakenteil 26, das zuvor seitlich gegen die Nadel gedrückt hatte, über die Nadelspitze 19 über. Dabei entspannt sich der zuvor axial zusammengedrückte Nadelschutz und die Endkante 31 löst sich aus ihrer Verankerung in dem Nadelansatz. Der federnde Nadelschutz 22 streckt sich dadurch in axialer Richtung und die scharfen Kanten der Löcher 27,28 graben sich in die Nadel 18 ein. Wie aus Fig. 5 erkennbar ist, wird das Loch 27 in axialer Projektion zu einer Ellipse. In gleicher Weise wird das Loch 28 in axialer Projektion zu einer Ellipse. Sobald also der Nadelschutz dadurch ausgelöst wurde, dass die Nadelspitze 19 das Hakenteil 26 passiert, schnappt das Hakenteil 26 über die Nadelspitze über und der NadelschutzFigs. 4 and 5 show the state of the short catheter during withdrawal of the needle 18 from the catheter tube 10 and the catheter hub 11. During withdrawal of the needle 18, the hook part 26, which had previously pressed against the side of the needle, snaps over the needle tip 19. In the process, the needle guard, which had previously been axially compressed, relaxes and the end edge 31 is released from its anchorage in the needle hub. The spring-loaded needle guard 22 thereby stretches in the axial direction and the sharp edges of the holes 27, 28 dig into the needle 18. As can be seen from Fig. 5, the hole 27 becomes an ellipse in axial projection. In the same way, the hole 28 becomes an ellipse in axial projection. As soon as the needle guard has been triggered by the needle tip 19 passing the hook part 26, the hook part 26 snaps over the needle tip and the needle guard

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verkrallt sich an der Nadel. Das Hakenteil 26 schirmt nun die Nadelspitze ab und blockiert eine distale Bewegung der Nadelspitze in bezug auf den Nadelschutz. Dadurch, dass der Nadelschutz axial expandiert und seine Abstützung an dem Katheteransatz aufgibt, kann er im Katheteransatz frei bewegt werden. Nach dem Auslösen des Nadelschutzes greift dieser mit zwei Löchern 27,28 an insgesamt vier Angriffspunkten an der Nadel an. Die Nadel 18 ist eine zylindrische Rundnadel ohne jegliche Einkerbungen, Vorsprünge oder Unrundheiten.claws at the needle. The hook part 26 now shields the needle tip and blocks a distal movement of the needle tip in relation to the needle guard. Because the needle guard expands axially and gives up its support on the catheter hub, it can be moved freely in the catheter hub. After the needle guard is released, it grips the needle at a total of four points of attack with two holes 27, 28. The needle 18 is a cylindrical round needle without any notches, projections or irregularities.

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Claims (6)

1. Kurzkatheter mit
einem Katheterrohr (10), das am proximalen Ende einen Katheteransatz (11) aufweist,
einer durch das Katheterrohr (10) steckbaren hohlen Nadel (18), die am proximalen Ende einen Nadelansatz (20) aufweist,
wobei der Nadelansatz (20) einen Vorsprung (21) hat, welcher in den Innenraum (12) des Katheteransatzes (11) hineinragt,
und mit einem im Innenraum (12) des Katheteransatzes (11) auf der Nadel (18) angeordneten Nadelschutz (22) aus einem Federelement, das Löcher (27, 28) für den Durchgang der Nadel (18) und am distalen Ende ein Hakenteil (26) aufweist, dadurch gekennzeichnet,
dass der Nadelschutz (22) in dem Katheteransatz (11) in axial gespanntem Zustand enthalten ist, wobei seine Enden gegen axiales Ausdehnen blockiert sind. 1. Short catheter with
a catheter tube ( 10 ) having a catheter hub ( 11 ) at the proximal end,
a hollow needle ( 18 ) which can be inserted through the catheter tube ( 10 ) and which has a needle attachment ( 20 ) at the proximal end,
wherein the needle hub ( 20 ) has a projection ( 21 ) which projects into the interior ( 12 ) of the catheter hub ( 11 ),
and with a needle guard ( 22 ) arranged in the interior ( 12 ) of the catheter hub ( 11 ) on the needle ( 18 ) and made of a spring element which has holes ( 27 , 28 ) for the passage of the needle ( 18 ) and a hook part ( 26 ) at the distal end, characterized in that
that the needle guard ( 22 ) is contained in the catheter hub ( 11 ) in an axially tensioned state, with its ends blocked against axial expansion. 2. Kurzkatheter nach Anspruch 1, dadurch gekennzeichnet, dass ein distales Blockierteil aus einem Metallteil (15) besteht, welches in das Katheterrohr (10) ragt und dieses in dem Katheteransatz (11) abstützt. 2. Short catheter according to claim 1, characterized in that a distal blocking part consists of a metal part ( 15 ) which projects into the catheter tube ( 10 ) and supports it in the catheter hub ( 11 ). 3. Kurzkatheter nach Anspruch 2, dadurch gekennzeichnet, dass das Metallteil (15) am Öffnungsende eines Trichters (16) eine nach innen weisende Stirnwand (17) aufweist. 3. Short catheter according to claim 2, characterized in that the metal part ( 15 ) has an inwardly directed end wall ( 17 ) at the opening end of a funnel ( 16 ). 4. Kurzkatheter nach einem der Ansprüche 1-4, dadurch gekennzeichnet, dass ein proximales Blockiermittel aus einer Endkante (31) des Nadelschutzes (22) besteht, welche in die Wand des Katheteransatz (11) hineinragt. 4. Short catheter according to one of claims 1-4, characterized in that a proximal blocking means consists of an end edge ( 31 ) of the needle guard ( 22 ) which projects into the wall of the catheter hub ( 11 ). 5. Kurzkatheter nach einem der Ansprüche 1-4, dadurch gekennzeichnet, dass das Hakenteil (26) gegen die Nadel (18) drückt und beim Passieren der Nadelspitze (19) derart über die Nadelspitze schnappt, dass der Nadelschutz (22) sich entspannt und mit Kanten seiner Löcher (27, 28) seitlich an der Nadel (18) angreift. 5. Short catheter according to one of claims 1-4, characterized in that the hook part ( 26 ) presses against the needle ( 18 ) and, when passing the needle tip ( 19 ), snaps over the needle tip in such a way that the needle guard ( 22 ) relaxes and engages the needle ( 18 ) laterally with edges of its holes ( 27 , 28 ). 6. Kurzkatheter nach einem der Ansprüche 1-5, dadurch gekennzeichnet, dass die Löcher (27, 28) oval sind, derart, dass bei axial zusammengedrücktem Nadelschutz (22) die Löcher in axialer Projektion rund sind und die Nadel (18) mit Spiel umgeben. 6. Short catheter according to one of claims 1-5, characterized in that the holes ( 27 , 28 ) are oval, such that when the needle guard ( 22 ) is axially compressed, the holes are round in axial projection and surround the needle ( 18 ) with play.
DE29921084U 1999-12-01 1999-12-01 Short catheter Expired - Lifetime DE29921084U1 (en)

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DE29921084U DE29921084U1 (en) 1999-12-01 1999-12-01 Short catheter
DE50010823T DE50010823D1 (en) 1999-12-01 2000-11-04 short catheter
ES00124007T ES2244384T3 (en) 1999-12-01 2000-11-04 SHORT CATHETER
EP00124007A EP1106199B1 (en) 1999-12-01 2000-11-04 Microcatheter
AT00124007T ATE300329T1 (en) 1999-12-01 2000-11-04 SHORT CATHETER
US09/727,747 US6709419B2 (en) 1999-12-01 2000-12-01 Short catheter
US10/779,370 US7186239B2 (en) 1999-12-01 2004-02-13 Short catheter
US11/327,206 US7160269B2 (en) 1999-12-01 2006-01-06 Short catheter
US11/678,499 US7806849B2 (en) 1999-12-01 2007-02-23 Short catheter

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Publication number Publication date
ES2244384T3 (en) 2005-12-16
DE50010823D1 (en) 2005-09-01
EP1106199A3 (en) 2001-08-29
EP1106199A2 (en) 2001-06-13
US6709419B2 (en) 2004-03-23
US20070156093A1 (en) 2007-07-05
US7186239B2 (en) 2007-03-06
US7160269B2 (en) 2007-01-09
US20040162522A1 (en) 2004-08-19
US20060184125A1 (en) 2006-08-17
US7806849B2 (en) 2010-10-05
ATE300329T1 (en) 2005-08-15
US20010018573A1 (en) 2001-08-30
EP1106199B1 (en) 2005-07-27

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